package demo2;

public class Screen implements IUSB {
    @Override
    public void openDevice() {
        System.out.println("打开显示屏");
    }

    @Override
    public void closeDevice() {
        System.out.println("关闭显示屏");
    }
    public void show() {
        System.out.println("开始显示");
    }
    @Override
    public void test1() {
        System.out.println("调用重写的test1()方法");
    }
}
